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how do i know a model is compatible with unity ?

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Hi ,

I am looking at this question http://answers.unity3d.com/questions/9393/game-asset-website-list-free-and-paid-textures-models-packs-etc and all the sites linked their and would like to know - what should i check in a model before i pay for it , most of the sites do not have their assets specifically tailored for unity. i know in the unity docs there is a list of supported asset types , is that enough for a model? and the other way around if there is a format not supported by unity for example .daz package , is there a way to convert to unity.

I would be happy to get some sort of link explaining the different asset types and what is the difference .

Which file formats are "supported by Unity" largely depends on which 3d-modelling packages you have installed on your machine. The reason is that unless you have FBX, Unity uses the actual modelling packages to convert the files to FBX which Unity natively supports (I think there's one or two other formats that Unity supports directly).

i know in the unity docs there is a
list of supported asset types , is
that enough for a model?

What else do you need? The list clearly specifies which are supported, and what features of each can Unity import. Do bear in mind that Unity only imports FBX natively, and for the other formats you will need to have the corresponding application so you can convert it.

Re performance: Not related to the format for the most part, since Unity ends up converting them to FBX anyway - it's not like it internally handles c4d's files different than blender's. You will want to look at the matrix on that table for the attributes that Unity can import, however, and the manual details for each file format supported.